The world and life have been mighty good to me. And I want to put something back.

We'll be eight degrees hotter in ten -- not ten, but thirty or forty years, and basically none of the crops will grow. Most of the people will have died and the rest of us will be cannibals.

Once you decide to do something, and you're pretty sure you're right, then you gotta go ahead and do it. Because if you piddle around, somebody else will beat you to it.

The chance for mistakes is about equal to the number of crew squared.

I regret that I wasn't more successful with my marriages, but it is what it is.

You should set goals beyond your reach so you always have something to live for.

Looking back, if I had to live my life over, there are things I would do differently, but the one thing I would not change is my charitable giving. I'm particularly thankful for my father's advice to set goals so high that they can't possibly be achieved during a lifetime and to give help where help is needed most. That inspiration keeps me energized and eager to keep working hard every day on giving back and making the world a better place for generations to come.